Discussions

For RS232 you probably just need to swap the receive and transmit pins. RS232 protocol states that each device will have a transmit and receive pin. In order to "hear" a device the transmit needs to enter the receive pin of the other device and vice versa.

ENC28J60 you will need to use a crossover network similar to what you would do with RS232. Transmit needs to enter the Receive pins. The difference here is that there are 4 wires to swap. See the discussion here: